Sanitation and hygiene for the tropics : book one, primer of sanitation for the tropics--book two, physiology and hygiene for the tropics / by John Woodside Ritchie & Margaret Anna Purcell ; with an introduction by David P. Barrows ... and a chapter on opium by ... Charles H. Brent.
Ritchie, John W. (John Woodside), 1871-1943. | Date: [1916], ©1916